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Lactation curves of milk, fat and protein in Egyptian buffalo using test-day model (Buffalo Bulletin,38(1))
Ezzat Atta Afifi - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Lactation curves of milk, fat and protein in Egyptian buffalo using test-day model (Buffalo Bulletin,38(1))
ผู้แต่ง / หัวหน้าโครงการ (EN): Ezzat Atta Afifi
หน่วยงานสังกัดผู้แต่ง (EN): Giza (Egypt). Buffalo Breeding Research Department:Benha University (Egypt). Faculty of Agriculture at Moshtohor. Department of Animal Production:Benha University (Egypt). Faculty of Agriculture at Moshtohor. Department of Animal Production
บทคัดย่อ (EN): Data on 4971 test-day milk yield traits [milk (TDMY), fat (TDFY) and protein (TDPY)] for 691 Egyptian buffalo cows, daughters of 120 sires and 532 dams were used for fitting the lactation curve parameters of milk, fat and protein yields using multiple-trait animal model. The random effects included in the model were direct additive genetic, permanent environment and error, while the fixed effects were herd test-day, year and season of calving and parity as well as days in milk as a covariable. The means for TDMY, TDFY, TDPY and lactation curve parameters [initial (a), ascending slope (b), descending slope (c), persistency (P), and maximum milk production during lactation (Ymax) and the peak test-day (PY)] were estimated. Heritabilities of TDMY, a, b, c, P, PY and Ymax were 0.22, 0.37, 0.38, 0.39, 0.37, 0.37 and 0.38, respectively. The corresponding heritabilities for TDFY and fat curve parameters were 0.21, 0.41, 0.40, 0.39, 0.38, 0.36 and 0.42, while the estimates for TDPY and protein curve parameters were 0.22, 0.38, 0.40, 0.40, 0.38, 0.40 and 0.43, respectively. Genetic correlations among TDMY and curve parameters of a, b, c, P, PY and Ymax were 0.31, -0.23, -0.34, 0.52, 0.48 and 0.87, respectively. Genetic and phenotypic correlations between milk yield traits were high (mostly of 0.83 and 0.99), like the correlations between curve parameter in milk, fat and protein (from 0.71 to 0.96). In practice, genetic selection for lactation curve parameters (a, P and Ymax) in the Egyptian buffalo would improve total milk yield traits.
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ภาษา (EN): en
เอกสารแนบ (EN): https://kukr.lib.ku.ac.th/db/kukr/search_detail/result/387368
คำสำคัญ (EN): Egypt
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Ezzat Atta Afifi. "Lactation curves of milk, fat and protein in Egyptian buffalo using test-day model (Buffalo Bulletin,38(1))". ไม่ระบุหน่วยงาน. ม.ป.ป.

Ezzat Atta Afifi. "Lactation curves of milk, fat and protein in Egyptian buffalo using test-day model (Buffalo Bulletin,38(1))". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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Lactation curves of milk, fat and protein in Egyptian buffalo using test-day model (Buffalo Bulletin,38(1))
Ezzat Atta Afifi
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Forecasting of buffalo milk in a Brazilian diary using the ARIMA model (Buffalo Bulletin,39(2)) Test-day genetic analysis of Murrah buffalo sires for milk production (Buffalo Bulletin (Thailand),35(1)) In silico characterization of Mx2 protein of buffalo (Bubalus bubalis) (Buffalo Bulletin,38(4)) Evaluation of milk fat as an alternative source of RNA from buffalo milk (Buffalo Bulletin (Thailand),37(2)) Native milk fat globule size and its influence on the natural creaming properties of buffalo milk (Buffalo Bulletin,37(4)) Ultrstructural study on efferent ductule of buffalo foetii (Buffalo Bulletin,38(3)) Production of buffalo milk (Bubalus bubalis) in Brazil (Buffalo Bulletin,39(3)) Cryptosporidiosis in buffalo calves (Buffalo Bulletin,39(2)) Milk and fatty acid composition of Anatolian water buffalo (Bubalus bubalis) from different provinces (Buffalo Bulletin,38(1)) Plasma chemical composition and progesterone hormone on day of estrus in Egyptian buffalo cows (Buffalo Bulletin (Thailand),36(4))
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